You can always download jgroups seperatly from www.jgroups.org and run the test. In the 2.2.1 release this test is included. Note that the jarfile then is named jgroups-all.jar.
Yes, sorry, because it is a JDK 1.4 dependent class, we didn't include it in the build. It is included in the 3.2.4 release, so you could simply replace the jgroups.jar from 3.2.3 with the onefrom 3.2.4.